This is a small example showing the issue here. It's just continuously running a simple WebGL program and transfer its rendering result into a bitmap renderer context, and report the time taken for each rendering loop in at the top of the page. On my machine, Firefox constantly shows 25~30ms per render, while Chrome shows 0~0.1ms per render. This difference is rather significant.
Bug 1788206 Comment 39 Edit History
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This is a small example showing the issue here. It's just continuously running a simple WebGL program and transfer its rendering result into a bitmap renderer context, and report the time taken for each rendering loop in at the top of the page. On my machine, Firefox constantly shows 25-30ms per render, while Chrome shows 0-0.1ms per render. This difference is rather significant.